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KMID : 1137820100310010067
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의공학회지
2010 Volume.31 No. 1 p.67 ~ p.73
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Study on Change of the Flatfoot’s Ankle Angle in Sagittal plane before and after Wearing FFO
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Park Kwang-Yong
Park Seung-Hwan
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Abstract
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The foot performs an important function in supporting the body and keeping body balance. An abnormal walking habit breaks the balance of the human body as well as the normal function of the foot. The influence of a flatfoot(pes planus) occupies a considerable portion of the various causes resulting in the wrong walking habit. But, little studies has been done by the functional foot orthotics for the flat foot. The object of this study, therefore, is to propose a new approach method to reveal the effects of the improvement of the foot function by using orthotics. The essential point of this study is to measure and analyze the change of ankle angle in the sagittal plane for flat foot subjects wearing the orthotics. Before and after wearing the functional orthotics, the gait analysis of flat foot subjects was conducted in three experimental aspects : the change of ankle angle, the change of the total Ankle ROM and the difference of left & right ankle angle in the sagittal plane. 1. The average ankle angle differences of before-and-after wearing the orthotics have declined like this; left : 2.71˚, right: 1.91˚ (p<0.05). 2. Total ankle ROM also showed decrease in both sides while the left side’s is rather slight; left : 0.57˚, right : 2.07˚ (p<0.05). 3. The difference of left and right ankle angle in the sagittal plane decreased by 0.71˚ (p<0.05). In result, it is confirmed that the functional foot orthotics have a significant effect on mechanical movement of ankle joint for flat foot. it is expected that this paper will be further studied and improved as a practical estimation method in the research on the effect of foot-orthotics.
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KEYWORD
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flat foot, functional foot orthotics, ankle angle, ankle ROM, ankle angle difference
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